8LSA55.EB045D200-3 B & R Automation
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The B & R Automation 8LSA55.EB045D200-3 is a three-phase synchronous motor from the 8LS Synchronous Motors series with a rated speed of 4500 rpm and a flange dimension of 142 mm. It uses an inductive EnDat 2.1 encoder with a multi-turn capability of 4096 revolutions and a resolution of 19 bits single turn and 12 bits multi-turn. The motor features self-cooling with free circulation, a smooth shaft, and standard holding brake, and includes an angled connector for connection.
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Product Description:
The 8LSA55.EB045D200-3 synchronous motor is produced by B&R Automation for the 8LS Synchronous Motors series. Revision 3 uses a three-phase synchronous stack matched to the 8LSA mechanical outline. In automated equipment, the unit converts drive current into commanded torque and speed for positioning or continuous axes. A mounting flange allows the motor to bolt directly to machine frames without extra brackets.
Its mechanical construction follows the standard 8LSA outline without a reinforced bearing, meaning the shaft runs on standard bearings suited for general-purpose loading. Power, feedback, and brake leads exit through an angled swivel connector, allowing cable trays to be routed parallel to the housing. Heat is dissipated by self-cooling with free air circulation, so no external blower or liquid circuit is required. The mounting flange measures 142 mm across and corresponds to the IEC size for medium-frame servomotors. With a rated speed of 4500 rpm, the motor supports high-velocity axes when paired with a compatible inverter. The housing follows length code 5, providing the axial dimensions associated with this motor configuration. Its smooth shaft end supports direct connection to suitable clamping couplings used with gearboxes or belt pulleys.
Position feedback is delivered by an inductive EnDat sensor that uses EnDat version 2.1 for bidirectional digital communication with the drive. The single-turn and multi-turn counters provide a resolution of 19/12 bits, while the internal gearing offers a multi-turn range of 4,096 revolutions without requiring a separate encoder battery. A standard holding brake engages when power is removed to prevent vertical loads from drifting. This braking arrangement helps retain the shaft position when drive torque is unavailable. Because the motor does not have an oil seal, the shaft interface must remain free from pressurized coolant. The swivel connector can be positioned to reduce cable strain and accommodate the routing requirements of the surrounding machine assembly.
